I may be the odd one out here, I read these threads with interest and hope to enlighten and educate myself a little, but some of these dust collection threads leave me amazed that my little 1.5hp, converted two stage, dust collector actually manages to suck up 99% of the waste cut off my projects.

My main run is 5" metal, about 4' across my garage ceiling, going to 4" at the blast gate with at 15' of 4" flexible hose going to my tools.

I use my little DC with my SawStop, Hammer A3-31 J/P, ShopFox molder, Laguna Bandsaw and SuperMax Drum Sander.

I catch cuttings and sawdust into a 55 gallon drum, beneath my Oneida Super Duty XL Cyclone.

I have thought about a more powerful DC, but haven't seen the need. I've never had a duct p clog or even the narrow area of a blast gate.